Power-on protection
Check
whether there is
central point voltage
Check which channel outputs
DC and then check this channel
Check
whether signal
is added or main volume
is increased and protection
is available
Check whether the diode o r
triode o f over-current protection
is damaged, or capacitor
C115 has trouble
Check
whether power
amplifier board resistor
R111, R141 has
open circuit
Check
whether resistor
R108 has open
circuit
Change resistor
Check
whether RLY
detect signal is
abnormal
Check whether power board
VD108 is low level and change V100
Whether
player protection
Change relay
Y
N
Y
Change resistor
Figure 3.3.2.1 Troubleshooting flow chart for “Power-on protection”
Y
Y
Y
Y
N
N
N
N
3.3.2 Troubleshooting flow chart
1. Troubleshooting process for “Power-on protection”is shown as in the following figure 3.3.2.1:
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Summary of Contents for AV311T
Page 1: ...service manual AV311T...
